Yellowstone National Park · Idaho, Montana, Wyoming

Harlequin Lake Trail

0.5 mi of trail, end to end · about 100 ft of climbing · 6,808 ft–6,916 ft · earth surface · trail class Minimally Developed · hiking

6,808 ft 6,896 ft · 0.5 mi high 6,916 ft

Trailhead Harlequin Lake Trailhead 6,803 ft Drive there

Harlequin Lake Trail the Park Service's write-up

30-60 Minutes · no dogs · Spring, Summer, Fall

Start Madison Junction

Lily pads dot a lake at the base of a slopping cliff.
Photo: NPS / Addy Falgoust

Follow the gentle, uphill trail to a small lake.

Notes: Return the same way.

This hike on nps.gov

On the parks map

All 473 trails in Yellowstone National ParkFind a trailOn the parks mapPark on nps.gov

About this trail's facts

The lines are the National Park Service's public trails layer, the trailheads and the waterfalls, views, peaks and historic places along them the Service's public points of interest, read 2026-10-16 and simplified for the map; the length is the line's, end to end. The write-ups are the Service's own "things to do" text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the park's own site before you go.